ProjectNodeData

Synopsis

This module computes a shadow projection of a 3D uniform scalar field onto the three major planes (xy, xz, yz).

Input Ports

Name	Type	Description
in	Mesh_Unif+Node_Data	input field for which the shadow projection takes place.

Parameters

Name	Type	Description	Name
axis	int	Projection Axis. This axis is perpendicular to the output plane.	Slider
method	enum	selection of projection methods	RadioBox

Output Ports

Name	Type	Description
out	Mesh_Unif+Node_Data	2D Projection througth the 3D data volume
obj	DefaultObject	Directly renderable object of the 2D output

Description

The ProjectNodeData module computes a shadow projection of the node data stored in a 3D uniform scalar field onto the 3 mojor planes (xy, xz, yz).

If the Node_Data contains multiple components, all the components use the same mapping method. The data value of point on the 2D plane is dependent on all the datapoints which are using the same coordinates in the 2 used axis in the 3D volume (i.e. if y is the mapping axis points with identical x and z coordinates will be used for the same point in the 2D field).

The module provides the following mapping methods:

• Maximum

  Each point on the plane is allocated the maximum value of all the node data values contibuting.

• Depth

  Each point on the plane is allocated the location of the maximum value of all the node data values contibuting on the mapping axis.

• Depth+Maximum

  Each point on the plane is allocated the maximum value multiplied by its location on the mapping axis.

• Mean

  Each point on the plane is allocated the average value of all the node data values contibuting.

• Sum

  Each point on the plane is allocated the sum of all the node data values contibuting.

• Magnitude

  Each point on the plane is allocated the magnitude (square root of values squared) of all the node data values contibuting.

Parameters

Inputs

in

Mesh_Unif+Node_Data that contains the 3D mesh to be projected

Parameters

axis

This slider allows to select the projection axis (perpendicular to the projection plane).

method

This radiobox is used to select the mapping method.

Outputs

out

This Mesh_Unif+Node_Data contains the 2D projection.

obj

This DataObject is a directly renderable object of the 2D projection.

Example

The example applications show the usage of ProjectNodeData in a 2D and 3D environment. The 3D example uses 3 ProjectNodeData modules to 'build the cube.

Files

iac_proj/projnd/projnd.v

Creates the IAC_PROJ.ProjectNodeData library.

iac_proj/projnd/prndmod.v

Creates the ProjectNodeDataMods library containing the low-level module ProjectNodeDataCore and the parameter group ProjectNodeDataParams.

iac_proj/projnd/prndmac.v

Creates the ProjectNodeDataMacs library containing the high-level macros ProjectNodeDataFunc, ProjectNodeDataUI and ProjectNodeData.

iac_proj/projnd/prndapp.v

Creates the ProjectNodeDataApps library containing the examle applications ProjectNodeData2DEg and ProjectNodeData3DEg.

Authors

Tobias Schiebeck
Manchester Visualization Centre

Contact

International AVS Centre
Manchester Visualization Centre
Kilburn Building
University of Manchester
Oxford Road
Manchester
United Kingdom
M13 9PL